Choosing a Stroker Cam??

[ActionJackson]

Ok, so since the motor is built, it finally comes down to a very import component - the cam. I have read a lot on here about the Comp Cam for the stroker. Seems good for a lot of low end torque, but there seems to be some trouble with "chewing the lobes" by something going wrong (wrong ZDDP in the oil, rocker ratio/spring compression, etc). I was wondering what anyone knew about the 505 Performance hydraulic roller cam. Seems to be a solution to the cam wear issue and is also good for an additional 50hp or so not to mention a higher redline.

Any input anyone??

AJ

http://www.shop.505performance.com/prod ... egoryId=31

[dwg86]

My opinion for what it's worth....I wouldn't run one, after I saw the grooves that were ground (by hand) down the side of the lifters. Unless 505 could tell you the purpose of these horrible looking, huge internal engine oil leaking grooves. You HAVE to run a high volume oil pump to overcome the internal oil leaks caused by the grooves. I wouldn't think the roller on the bottom of the lifter needs that much oil.
If the guys from 505 are reading this, I don't mean to be bad mouthing your products. I think it's great for any company to offer performance products for the Jeep 6. But the pics I saw of the roller lifters looked bad.

See page 3 of this thread for pics of the lifters http://www.jeepstrokers.com/forum/viewt ... m+bearings

Also, for what its worth, The camsaver lifters offered by Crower have a very small flat ground down the sides of the lifter. It's only a few thousands of an inch, and it lets more oil to the cam. Crower says it drops oil psi from 2-5 psi. Those huge grooves on the roller lifters have got to bleed a lot of oil pressure.

[SilverXJ]

I wouldn't run one either. I am unimpressed by the profiles offered and its still a cast cam blank. The oil groove issue is also scary. They are too large. Their pre purchase support isn't great either.

I also don't like the Crower cam saver lifters. They might help, but the problem is that the lifter is constantly rotating, and the oil needs to be dropped on the cam lobe before it goes under the lifter. So, it will only be helping a small percentage of the time. The lifter them selves are good, Topline/Johnson lifters. If you want more oil to the cam I suggest the lifter bore grooving.

[I6FAN]

I thought they looked rough when I first saw them as well. Sometimes when manufacturers scrap product, they deface it in some way so it doesn't get back into the "good" population. That's what I thought of when seeing them, but I really think it was someones "seat-of-the-pants" attempt at trying to supply more oil to the lobes done in a non analytical fashion.

[basscat]

I agree that the grooves are not indicative of craftsman level machine work. My machinist wanted me to buy a new set of roller lifters and let him mill a small flat spot along the side of each lifter. Since scalper is running fine, I decided to try them with the hv pump and see where it goes. If I could rewind the clock, I would've went with a stock cam and lifters because low end torque is all I need. But, the clock no rewind...

[scalper]

I really liked the power diference using the 505 stage 2 cam over my old comp 63 231.I knocked off 4 tenths and gained 4mph in the 1/4 between the two.i recently built another 4.7 for my dd sleeper using the 505 stage 3 and it seems to pull hard to redline .cant wait to take this one to the track.realy dont know whats not to like about the 505 specs,works great with a 150 shot of spray,good drivability and decent mileage.i admit i was a little leary about the grooves in the lifters but my oil pressure been great so other than the cosmetics of it i am not having problems.im sure 505 could sell a kit with non groved lifters.got 19000 miles on my old 4.7 with the stage 2 so durability been good so for.zach at 505 says he gives a 1 year warranty on these kits so thats not to bad customer support.

[SkylinesSuck]

You are claiming a 4/10ths and 4mph gain in the 1/4 with just a cam swap? I have a hard time believing that, especially over and already aftermarket cam.

[ActionJackson]

I think I can see 4/10ths shaved off with the cam swap and a 150 shot of nitrous. I am curious about these grooves. I have also been considering the 280 cam from Clifford. Any input on these? I am waiting for Larry from Clifford Performance to get back to me with the specs on the cam. I am not looking anything to radical. Something mechanically sound that will work with my 4.9 Clifford stroker that will run with a tunable Uni-chip. Input is appreciated. Here are the specs:

4.9L bored .060 over
Custom offset ground 258 crank
Clifford 290 dur. cam and solid lifters
10:1 comp
Arias pistons
Eagle Chevy 327 rods
Custom head work
CRT HEI distributor and 8mm wires
Clifford timing set
Balanced to 7000 rpm
All ARP hardware
Clifford Roller Rockers

P.S.
I am going to swap out the 290 cam. Anyone looking for one? Make you a deal.

[scalper]

i would be mad if 150 shot only knocked off 4 tenths.

[dwg86]

I think I can see 4/10ths shaved off with the cam swap and a 150 shot of nitrous. I am curious about these grooves. I have also been considering the 280 cam from Clifford. Any input on these? I am waiting for Larry from Clifford Performance to get back to me with the specs on the cam. I am not looking anything to radical. Something mechanically sound that will work with my 4.9 Clifford stroker that will run with a tunable Uni-chip. Input is appreciated. Here are the specs:

4.9L bored .060 over
Custom offset ground 258 crank
Clifford 290 dur. cam and solid lifters
10:1 comp
Arias pistons
Eagle Chevy 327 rods
Custom head work
CRT HEI distributor and 8mm wires
Clifford timing set
Balanced to 7000 rpm
All ARP hardware
Clifford Roller Rockers

P.S.
I am going to swap out the 290 cam. Anyone looking for one? Make you a deal.

I am running an Engle cam, 214 dur @ .050/ .501 lift, 112 lobe centers. I like it. It's a good torquey cam. It comes on really strong about 2500 and pulls hard through 4500 rpm. No problems with my 2003 computer controlled TJ. Very slight lope when cold, by smooths out after warm.

I am curious about your setup. What stroke is your engine now? How did Clifford get the 327 rods to work on the 258 crank? The 327 rods should be WAY too narrow. The big end width on the 327 rods are .940. Jeep rods are 1.060 wide. That's a differance of .120. I think max side clearance on the rods is .020.

[SilverXJ]

I am curious about these grooves.

Good pictures of the grooves here: http://www.jeepstrokers.com/forum/viewt ... 478#p19478 Good idea, but they are just too large.

I have also been considering the 280 cam from Clifford. Any input on these?

Hesco has an interesting cam. 310* duration iirc. However they modify the hydraulic lifters to act similar to rhodes lifters/solid EDM hole lifters. Sounds like a solid lifter cam and has great throttle response I have been told.

[4.whoa]

It seems the biggest hangup everyone has with the roller cam is the grooved lifters. Why not use lifters from a v8? LA engines use the exact same flattappet ,so why not use a roller lifter from it?

[ActionJackson]

Good question about the 327 rods. I will have to take a look. I think they used the smaller rods to reduce reciprocating mass. Not sure. As for the stroke, another good question. I will have to get with Clifford on this. I bought the engine built and just wanted to make a few mods. Seemed like a good start.

Hmm....

[SkylinesSuck]

I really liked the power diference using the 505 stage 2 cam over my old comp 63 231.I knocked off 4 tenths and gained 4mph in the 1/4 between the two.i recently built another 4.7 for my dd sleeper using the 505 stage 3 and it seems to pull hard to redline .cant wait to take this one to the track.realy dont know whats not to like about the 505 specs,works great with a 150 shot of spray,good drivability and decent mileage.

I think I can see 4/10ths shaved off with the cam swap and a 150 shot of nitrous.

He was saying he got 4/10th's from just the cam, not the cam and 150 shot.

i would be mad if 150 shot only knocked off 4 tenths.

You and me both LOL.

[dwg86]

Good question about the 327 rods. I will have to take a look. I think they used the smaller rods to reduce reciprocating mass. Not sure. As for the stroke, another good question. I will have to get with Clifford on this. I bought the engine built and just wanted to make a few mods. Seemed like a good start.

Hmm....

By using a small journal chevy rod, you can offset grind the crank to get a longer stroke. But the V8 rods are too narrow.
It would be nice to know how they used the 327 chevy rods, it might open some doors and options on stroked Jeep engines.